Question

Find the value of
pq3 if p-q=1, Pq = 5/3​

Answer 1

Step-by-step explanation:

P-q=10/9

cubing on both sides

⇒(p-q)³=(10/9)³

⇒p³-q³-3pq(p-q)=1000/729

⇒p³-q³-3×(5/3)×(10/9)=1000/729

⇒p³-q³-50/9=1000/729

⇒p³-q³=1000/729+50/9

⇒p³-q³=(1000+405)/729

⇒p³-q³=1405/729=(approx.)1.93